pythonPackages.pytestcache: Move to own file

pkgs/development/python-modules/pytestcache/default.nix

@@ -0,0 +1,28 @@
+{ stdenv, buildPythonPackage, fetchPypi
+, pytest, execnet }:
+
+buildPythonPackage rec {
+  pname = "pytest-cache";
+  version = "1.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1a873fihw4rhshc722j4h6j7g3nj7xpgsna9hhg3zn6ksknnhx5y";
+  };
+
+  buildInputs = [ pytest ];
+  propagatedBuildInputs = [ execnet ];
+
+  checkPhase = ''
+    py.test
+  '';
+
+  # Too many failing tests. Are they maintained?
+  doCheck = false;
+
+  meta = with stdenv.lib; {
+    license = licenses.mit;
+    homepage = https://pypi.python.org/pypi/pytest-cache/;
+    description = "pytest plugin with mechanisms for caching across test runs";
+  };
+}

pkgs/top-level/python-packages.nix

@@ -1914,29 +1914,7 @@ in {
 
   pytest-aiohttp = callPackage ../development/python-modules/pytest-aiohttp { };
 
-  pytestcache = buildPythonPackage rec {
+  pytestcache = callPackage ../development/python-modules/pytestcache { };
-    name = "pytest-cache-1.0";
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/p/pytest-cache/pytest-cache-1.0.tar.gz";
-      sha256 = "1a873fihw4rhshc722j4h6j7g3nj7xpgsna9hhg3zn6ksknnhx5y";
-    };
-
-    buildInputs = with self; [ pytest];
-    propagatedBuildInputs = with self ; [ execnet ];
-
-    checkPhase = ''
-      py.test
-    '';
-
-    # Too many failing tests. Are they maintained?
-    doCheck = false;
-
-    meta = {
-      license = licenses.mit;
-      homepage = "https://pypi.python.org/pypi/pytest-cache/";
-      description = "pytest plugin with mechanisms for caching across test runs";
-    };
-  };
 
   pytest-catchlog = buildPythonPackage rec {
     name = "pytest-catchlog-1.2.2";